Improvement in gbates foe cookkg-stoves



@uitte gisten getter. ffice;

WILLIAM n. WHITEHEAD, 0F eHicAGo. ILLINOIS. Luo" Parmi No. 69,879, and ocrpbf 1'5, 18er.

IMPROVEMENT INGRATBS POB. UOOAKlr'S-STOVBSi TO ALL WHOM IT MAY CONCERN:

Be it known that' I, WILLIAM E. Wnuunxsn, of the city of Chicago, in' the 'emmty of Cook," and State of f Illinois, have invented certain new and. useful Improvement-s in Stoves; and I do hereby declare that the fol#` n lowing is a ifull, clear,"and exact description thereof, reference being had'tgthe.:companyingdriiwings, making' a part of tlu's specification, in which- Figure 1 is a transverse vertical section. t Figure 2, a longitudinal vertici!! section. Figure 3, a top view of a portion of the grato detached, und Figure 4V a front view of the lower end of one of the end plates of the Aiire-liox. Like letters refer tothe same parts in all of the gures.

- The nature of my Vinvention consists in providing the buck of the iirediox of astovo with a plate arrsngeu or constructed to operate with an adjust'nble lower grate, so that that portion of it which is between' the poiptsy' of change in the position of the grate will be vertical, and the portion above that inclined backwards, auch plato to be provided'with rests' or stops to prevent the tipping of the grate in providing the back part of the rc box, near tho-top, with an additionol'plate, or a part of the' same plateas tho back plate inclined forwards front the back plate, and providing such additional plate with hollow knobs or projections projecting inwards, and

connected et the top hy ledges,'the plate and knobs being' provided withairholes :o in making the grate adjust 1 ojcctions,f to prevent the displscemclt'of tbe-J able in a novel manner; in providing one of the end plates with pr To enable others skiiied'in the art to make and use my invention, I wiil describe its construction and operation.

A represents a stove, of any suitable corstruction. In this stove'I 'construct my Ere-box. The front plato P has its upper hnlt` made solid, and its lower half grated; as shown at Q, iig. 2. The end plate G islocntcd at the end where the side door is usually placed, and is provided with two holes, L and M, through which the shaft F of the bottom grate passes far enough to admit oi'. a wrench or shaker being placed en ,its end, so as to shake down the ashes, and so also as to permit the closing of the sidodeor.- At the side of the opening L a bracket or projection c is placed, so that when the grate E is inserted and turned down to its place, it will -ot move so as to permit the opposite end to fall, either in ordinary use or when shaking the ashes. The lowerhole M has a similar ledge or projection around the bottoni and st one side for like purposes. The opposite c nd plate II,

' which, with all the others, is corrugatcdf'has also two corresponding holes, I snd'J,-made in the middle swell of the corrugations,and side openings or slots a and b are eut in opposite sides, so that the' shaft O; at the end of the grate E, can be inserted. Both of thcse holes vare provided with circular .ledges j and k, and are provided with lips to insure the entrsnceef the grate. The back plate B B and C is cast in one piece, and so locatedthat the lower'part B will stand'rpcrpenndicnlur, the part B incline back, and the part C incline forward. At

the upper end of 'the vertical portion aflng or projection, f, is cast, so that, in connection witlrprojection or catch e of Vthe grate, the grate will he prevented fromturning. A similar projection, p, is made st the bottom. The

upper portion C of the haelt plate' provided with hollow projections D, which are curved on the outer surface,

and made oblong, ss shown at 6g. 1. 'In these projections two or more sumll vent-holen' nrc made, ,and similar: ones are made in the plate between them,which connect with vthe air-chamber T between the iir,c-box vand the oven, and the to;- of the plate is prcvidodwith ledges or projections/t connecting the Aohlate projeetions'it the top 'lhis arrangement forms cross-currents and eddics in the passage of the products of eombustionfsn also cross-currentsof-the air introduced from the ba'cl: of the re-box, which improves it materially ns s gas-limnex'. I provide the stove, in which I place my lire-box, with upper feed-doors S, but as these are commente man)t stoves they need not be described, but in use will be foundvei'y desirable if not necessary when the gratejs in -its upper position. In other respecta any convenient constructio of'the stove can be adapted to the use of my ire-box.

In operation' for a winter stove the grate E is placed in the holes .l and M, so that, in combination with the ed grate Q, an 'open-grated. tire-place is formed, and the draught is through the bottom and the front gratos.

For u.' summerstore, for either cooler wood, thegrato is' placed in thehelcs and L, so' that the fro'nt grate is "closed and tho draught-is only through` the bottom grate E, and thevre-box made much shallower, so as te bring the re up in closo contact withtho vessels placed on the top, of' the stove, and producen great saving in fnolwithout changing the parts, except in position, and n'ithoutthe use of extra or additional grates, changing it from an open vto a close irebox.' This change also prevents the stove from heating upthe room in summer. Having thus fully described my improved lire-box for stoves, whatI claim as new, and desir to secure by Letters Patent, is-

1. The changeable revolving grate E, in combinntionwith the end plates G andl, and front grate P Q for the purpose of changing the fire-box from an open to a close grate, substantially as specified.

2. The projection or lock c attached to the end plate G, substantially as and for the purposes set forth.

3. The back plate B B and C, when consti-acted substantially as described, and so located that the upper ,portion L' will incline towardsthe fwnt, the middleperton B inclin'e backwards, and the lower B remain vertical, lo aste admit of a change-in position of tho grate E, substantially us specified.

4.-The combination and arrangement of the front grate I Q, bacleplatc B B C, and-the' end plates G and H, with an adjustable revolyingbottoni grate, E, constructed and operating substantially as specified.

I WM. n. wm'rEimAD. Witnesses:

L. L. Bonn,

E. )tf- Wxs'r. 

